:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --border: #334155;
}

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.2s;
    font-weight: 500;
}

nav a:hover, nav a.active {
    color: var(--text-primary);
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-item h3 {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-item p {
    margin: 5px 0 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.price-up { color: var(--success); }
.price-down { color: var(--danger); }

.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.btn-buy {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.btn-buy:hover {
    background-color: var(--success);
    color: white;
}

.btn-sell {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-sell:hover {
    background-color: var(--danger);
    color: white;
}

.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    position: relative;
    border: 1px solid var(--border);
}

.close {
    position: absolute;
    top: 15px; right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    background: var(--bg-color);
    border: 1px solid var(--border);
    color: white;
    border-radius: 6px;
    font-size: 1rem;
}

.flash-message {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}
.flash-success { background: rgba(16, 185, 129, 0.2); color: var(--success); border: 1px solid var(--success); }
.flash-error { background: rgba(239, 68, 68, 0.2); color: var(--danger); border: 1px solid var(--danger); }

.sector-tag {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 20px;
    background: rgba(255,255,255,0.1);
    color: var(--text-secondary);
}